A pair of Bewick's swans (image)

Netherlands Institute of Ecology (NIOO-KNAW)

Caption

The research was only possible because of the code some swans carry. Sightings of these tagged animals - often by citizen scientists - offer insight into the whereabouts of individual swans and changes therein. In winter, the swans favour areas with an air temperature of 5.5 °C.

Credit

Bart Nolet/NIOO-KNAW

Usage Restrictions

Only to be used in combination with the subject of this news story

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.